Adding xml nodes from one xml file into another with powershell into a specific existing node in File 2

Question

I want to add existing XML nodes from one file into another XML file by using PowerShell. (Edit the Web.config from some webservices). I tried many ways but I don`t get it running, any help would be appreciated!

My File1 contains some code like:

<?xml version="1.0"?>
<services>
  <service name="MyService.HelloWorld">
    <endpoint binding="wsHttpBinding" bindingConfiguration="NewBinding0" bindingNamespace="http://tempuri.org/HelloWorld/" contract="MyService.HelloWorld" />
  </service>
  <service name="MyService.HelloMars">
    <endpoint binding="wsHttpBinding" bindingConfiguration="NewBinding0" bindingNamespace="http://tempuri.org/HelloMars/" contract="MyService.HelloMars" />
  </service>
  .........

Now I want to add all the services into another xml file (the Web.config) and there into a specific node.

My File2 contains some code like:

<?xml version="1.0" encoding="utf-8"?>

<configuration>
	<configSections>
		<sectionGroup name="applicationSettings"
			type="System.Configuration.ApplicationSettingsGroup, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
			<section name="MyServices.Properties.Settings"
				type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false"/>
		</sectionGroup>
	</configSections>
	<system.web>
		<compilation debug="true" targetFramework="4.0"/>
	</system.web>
	<system.serviceModel>

  ............ (some more code)
      
		<diagnostics>
			<messageLogging logEntireMessage="true" logMalformedMessages="true"       logMessagesAtServiceLevel="true" logMessagesAtTransportLevel="true"
				maxMessagesToLog="2000"/>
		</diagnostics>
		<services>

		**(HERE I WANT TO ADD MY SERVICES!)**
			
		</services>      
  

I also need to modify the imported services, by adding them an extra parameter (Endpoint), so that they look like this: (adding the address parameter)

<service name="MyServices.HelloWorld">
<endpoint binding="wsHttpBinding" bindingConfiguration="NewWsHttpBinding"   bindingNamespace="http://tempuri.org/HelloWorld/"
address="https://...../HelloWorld.svc" contract="MyServices.HelloWorld"/>
</service>

I tried many ways I found on the internet, but none worked. The last thing I tried to at least merge the files was:

$webConfig = [xml](Get-Content C:\...\Web.config)
$webConfigNode = $webConfig.configuration.system.serviceModel.services
$servicesToAdd = [xml](Get-Content C:\...\services.config)
$servicesToAddNode = $servicesToAdd.services

while ($servicesToAddNode.HasChildNodes)
{
    $cn = $servicesToAddNode.FirstChild
    $cn = $servicesToAddNode.RemoveChild($cn)
    $cn = $webConfigNode.OwnerDocument.importnode($cn)
    $webConfigNode.AppendChild($cn)
}

but I get the following error message:

It is not possible to run a method for an expression which is null
+     $cn = $webConfig.OwnerDocument.importnode($cn)
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : InvokeMethodOnNull

Thanks for any help!

Answer 1

Obviously too late for you, but for anyone else, the short version is that in .NET's XML Document model, nodes belong to their document, so you have to ...

• FIRST call Document.ImportNode to clone a node into a new document
• THEN actually insert or append the imported node somewhere

For example, if you:

$Source = [xml]'<root><a><s name="one"/><s name="two"/></a></root>'
$Dest = [xml]'<root><b><s name="three"/></b></root>'
foreach($node in $Source.root.a.s) {
    $clone = $Dest.ImportNode($node, $true)
    $null = $Dest.root.b.AppendChild($clode)
}

Then, your $Dest.OuterXml will be:

<root><b><s name="three" /><s name="one" /><s name="two" /></b></root>